■ Flame-retardant polypropylene long glass fiber composite

  ▶ Thermoplastic long-fiber composites (>10 mm)with resins offer high strength, modulus,

     and impact resistance, suited for EV and high-frequency communication parts.

  ▶ In electric vehicles, the battery casing protects against shocks and fire. As lighter designs

     are needed, plastics are increasingly replacing metals for battery housings.

 

 

■ Technology Development

The FR-PP-LFT is a composite based on polypropylene, reinforced with long fibers, high-impact PP, and flame retardants. Optimized formulation and processing deliver both high rigidity and strong flame resistance.

  ▶ Phosphorus–Nitrogen Intumescent System: Halogen-free PP masterbatch designed for

     low loading and synergistic performance, achieving UL94 V-0 at 0.8 mm with improved

     impact strength.

  ▶ Dual-Masterbatch LFT Process: In LFT injection, combining PP-GF masterbatch with P–

     N flame-retardant masterbatch ensures agent dispersion and fiber integrity, enhancing

     molding quality.

 

 

■ Development Process and Results

 

 

 

 

 

 

■ Contact Us

Material and Chemical Research Laboratories

Dept. of Precise Radical Polymerization and Application Department(P200)

 

Meng-Hsin Chen

Tel:03-5732530

E-mail:itri990023@itri.org.tw

 

Monica Huang

Tel:03-5732521

E-mail:huang@itri.org.tw